title: Lymphocyte response to phytohemagglutinin in seropositive and seronegative forms of rheumatoid arthritis.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000276:immunology*; D005260:Female; D006386:Hemagglutination Tests; D006801:Humans; D008213:Lymphocyte Activation; D008297:Male; D010835:Phytohemagglutinins / Q000494:pharmacology*
chemical_list: D010835:Phytohemagglutinins